Geochemistry of late Mesozoic mafic rocks from the Dabie-Sulu region, China: constraints on the nature of lithospheric mantle beneath the orogen
文献类型：期刊论文
| 作者 | Guo, F; Fan, WM; Wang, YJ; Li, CW; Li, XY; Zhang, HF |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2005-07-01 |
| 卷号 | 21期号:4页码:1265-1270 |
| 关键词 | Subducted Continental Crust Mafic Magmatism Lithospheric Mantle Late Mesozoic Northern Dabie Terrane |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Late Mesozoic mafic rocks (including mafic dikes/lamprophyres, volcanic rocks and ultramafic to mafic intrusions) from the Dabie-Sulu region show arc-like trace element features (high LILE/HFSE and LREE/HFSE ratios) and have highly radiogenic Sr (1(Sr) = 0.7065 similar to 0.7090) and non-radiogenic Nd (epsilon(Nd) (t) = - 19 similar to -10) isotopic compositions. Most of the mafic rocks have superchondritic Nb/Ta and Zr/Hf ratios, probably as a consequence of relatively CO2- and rutile- rich melt metasomatism in response to the detachment/breakoff of the Yangtze subducted continental slab. The enriched Sr-Nd isotopic signatures in these mafic rocks suggest that the metasomatic melts were probably derived from the subducted continental crust as evidenced by the high-pressure to ultrahigh-pressure metamorphic assemblage in the orogen. The geochemical and isotopic features of the mafic rocks from the Dabie-Sulu region indicate that interaction between melts derived from the subducted continental slab and the overlying mantle is an important mechanism for LILE and LREE enrichment of the lithospheric mantle beneath the orogen. |
| WOS关键词 | PRESSURE METAMORPHIC TERRANE ; EASTERN CHINA ; NORTH CHINA ; ISOTOPIC COMPOSITIONS ; TECTONIC IMPLICATIONS ; CONTINENTAL-CRUST ; TRACE-ELEMENT ; ND ; BELT ; SYSTEMATICS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000232291300023 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65224]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Guo, F |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, F,Fan, WM,Wang, YJ,et al. Geochemistry of late Mesozoic mafic rocks from the Dabie-Sulu region, China: constraints on the nature of lithospheric mantle beneath the orogen[J]. ACTA PETROLOGICA SINICA,2005,21(4):1265-1270. |
| APA | Guo, F,Fan, WM,Wang, YJ,Li, CW,Li, XY,&Zhang, HF.(2005).Geochemistry of late Mesozoic mafic rocks from the Dabie-Sulu region, China: constraints on the nature of lithospheric mantle beneath the orogen.ACTA PETROLOGICA SINICA,21(4),1265-1270. |
| MLA | Guo, F,et al."Geochemistry of late Mesozoic mafic rocks from the Dabie-Sulu region, China: constraints on the nature of lithospheric mantle beneath the orogen".ACTA PETROLOGICA SINICA 21.4(2005):1265-1270. |
入库方式： OAI收割
来源：地质与地球物理研究所
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